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Pogodin P, Alkhazov G, Atamantchouk AG, Balatz MY, Bondar NF, Cooper PS, Dauwe LJ, Davidenko GV, Dersch U, Dolgolenko AG, Dzyubenko GB, Edelstein R, Emediato L, Endler AF, Engelfried J, Eschrich I, Escobar CO, Evdokimov AV, Filimonov IS, Garcia FG, Gaspero M, Giller I, Golovtsov VL, Gouffon P, Gülmez E, He K, Iori M, Jun SY, Kaya M, Kilmer J, Kim VT, Kochenda LM, Konorov I, Kozhevnikov AP, Krivshich AG, Krüger H, Kubantsev MA, Kubarovsky VP, Kulyavtsev AI, Kuropatkin NP, Kurshetsov VF, Kushnirenko A, Kwan S, Lach J, Lamberto A, Landsberg LG, Larin I, Leikin EM, Li Y, Luksys M, Lungov T, Maleev VP, Mao C, Mao D, Mao Z, Mathew P, Mattson M, Matveev V, McCliment E, Moinester MA, Molchanov VV, Morelos A, Nelson KD, Nemitkin AV, Neoustroev PV, Newsom C, Nilov AP, Nurushev SB, Ocherashvili A, de Oliveira E, Onel Y, Ozel E, Ozkurucuklu S, Penzo A, Petrenko SV, Procario M, Prutskoi VA, Ramberg E, Rappazzo GF, Razmyslovich BV, Rud VI, Russ J, Schiavon P, Simon J, Sitnikov AI, Skow D, Smith VJ, Srivastava M, Steiner V, Stepanov V, Stutte L, Svoiski M, Terentyev NK, Thomas GP, Uvarov LN, Vasiliev AN, Vavilov DV, Verebryusov VS, Victorov VA, Vishnyakov VE, Vorobyov AA, Vorwalter K, You J, Zhao W, Zheng S, Zukanovich-Funchal R. Polarization ofΣ+hyperons produced by 800 GeV/c protons on Cu and Be. Int J Clin Exp Med 2004. [DOI: 10.1103/physrevd.70.112005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Evdokimov AV, Akgun U, Alkhazov G, Amaro-Reyes J, Atamantchouk AG, Ayan AS, Balatz MY, Bondar NF, Cooper PS, Dauwe LJ, Davidenko GV, Dersch U, Dolgolenko AG, Dzyubenko GB, Edelstein R, Emediato L, Endler AMF, Engelfried J, Eschrich I, Escobar CO, Filimonov IS, Garcia FG, Gaspero M, Giller I, Golovtsov VL, Gouffon P, Gülmez E, Kangling H, Iori M, Jun SY, Kaya M, Kilmer J, Kim VT, Kochenda LM, Konorov I, Kozhevnikov AP, Krivshich AG, Krüger H, Kubantsev MA, Kubarovsky VP, Kulyavtsev AI, Kuropatkin NP, Kurshetsov VF, Kushnirenko A, Kwan S, Lach J, Lamberto A, Landsberg LG, Larin I, Leikin EM, Yunshan L, Luksys M, Lungov T, Maleev VP, Mao D, Chensheng M, Zhenlin M, Mathew P, Mattson M, Matveev V, McCliment E, Moinester MA, Molchanov VV, Morelos A, Nelson KD, Nemitkin AV, Neoustroev PV, Newsom C, Nilov AP, Nurushev SB, Ocherashvili A, Onel Y, Ozel E, Ozkorucuklu S, Penzo A, Petrenko SV, Pogodin P, Procario M, Ramberg E, Rappazzo GF, Razmyslovich BV, Rud VI, Russ J, Schiavon P, Simon J, Sitnikov AI, Skow D, Smith VJ, Srivastava M, Steiner V, Stepanov V, Stutte L, Svoiski M, Terentyev NK, Thomas GP, Torres I, Uvarov LN, Vasiliev AN, Vavilov DV, Vázquez-Jáuregui E, Verebryusov VS, Victorov VA, Vishnyakov VE, Vorobyov AA, Vorwalter K, You J, Wenheng Z, Shuchen Z, Zukanovich-Funchal R. Observation of a narrow charm-strange meson D(+)(sJ)(2632)-->D(+)(s)eta and D(0)K(+). Phys Rev Lett 2004; 93:242001. [PMID: 15697795 DOI: 10.1103/physrevlett.93.242001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2004] [Indexed: 05/24/2023]
Abstract
We report the first observation of a charm-strange meson D(+)(sJ)(2632) at a mass of 2632.5+/-1.7 MeV/c(2) in data from SELEX, the charm hadro-production experiment E781 at Fermilab. This state is seen in two decay modes, D(+)(s)eta and D0K+. In the D(+)(s)eta decay mode we observe a peak with 101 events over a combinatoric background of 54.9 events at a mass of 2635.4+/-3.3 MeV/c(2). There is a corresponding peak of 21 events over a background of 6.9 at 2631.5+/-2.0 MeV/c(2) in the decay mode D0K+. The decay width of this state is <17 MeV/c(2) at 90% confidence level. The relative branching ratio Gamma(D0K+)/Gamma(D(+)(s)eta) is 0.14+/-0.06. The mechanism that keeps this state narrow is unclear. Its decay pattern is also unusual, being dominated by the D(+)(s)eta decay mode.
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Mattson M, Alkhazov G, Atamantchouk AG, Balatz MY, Bondar NF, Cooper PS, Dauwe LJ, Davidenko GV, Dersch U, Dolgolenko AG, Dzyubenko GB, Edelstein R, Emediato L, Endler AMF, Engelfried J, Eschrich I, Escobar CO, Evdokimov AV, Filimonov IS, Garcia FG, Gaspero M, Giller I, Golovtsov VL, Gouffon P, Gülmez E, Kangling H, Iori M, Jun SY, Kaya M, Kilmer J, Kim VT, Kochenda LM, Konorov I, Kozhevnikov AP, Krivshich AG, Krüger H, Kubantsev MA, Kubarovsky VP, Kulyavtsev AI, Kuropatkin NP, Kurshetsov VF, Kushnirenko A, Kwan S, Lach J, Lamberto A, Landsberg LG, Larin I, Leikin EM, Yunshan L, Luksys M, Lungov T, Maleev VP, Mao D, Chensheng M, Zhenlin M, Mathew P, Matveev V, McCliment E, Moinester MA, Molchanov VV, Morelos A, Nelson KD, Nemitkin AV, Neoustroev PV, Newsom C, Nilov AP, Nurushev SB, Ocherashvili A, Oliveira E, Onel Y, Ozel E, Ozkorucuklu S, Penzo A, Petrenko SV, Pogodin P, Procario M, Prutskoi VA, Ramberg E, Rappazzo GF, Razmyslovich BV, Rud VI, Russ J, Schiavon P, Simon J, Sitnikov AI, Skow D, Smith VJ, Srivastava M, Steiner V, Stepanov V, Stutte L, Svoiski M, Terentyev NK, Thomas GP, Uvarov LN, Vasiliev AN, Vavilov DV, Verebryusov VS, Victorov VA, Vishnyakov VE, Vorobyov AA, Vorwalter K, You J, Wenheng Z, Shuchen Z, Zukanovich-Funchal R. First observation of the doubly charmed baryon Xi(+)(cc). Phys Rev Lett 2002; 89:112001. [PMID: 12225136 DOI: 10.1103/physrevlett.89.112001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2002] [Indexed: 05/23/2023]
Abstract
We observe a signal for the doubly charmed baryon Xi(+)(cc) in the charged decay mode Xi(+)(cc)-->Lambda(+)(c)K-pi(+) in data from SELEX, the charm hadroproduction experiment at Fermilab. We observe an excess of 15.9 events over an expected background of 6.1+/-0.5 events, a statistical significance of 6.3sigma. The observed mass of this state is 3519+/-1 MeV/c(2). The Gaussian mass width of this state is 3 MeV/c(2), consistent with resolution; its lifetime is less than 33 fs at 90% confidence.
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Affiliation(s)
- M Mattson
- Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213, USA
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Kushnirenko A, Alkhazov G, Atamantchouk AG, Balatz MY, Bondar NF, Cooper PS, Dauwe LJ, Davidenko GV, Dersch U, Dolgolenko AG, Dzyubenko GB, Edelstein R, Emediato L, Endler AM, Engelfried J, Eschrich I, Escobar CO, Evdokimov AV, Filimonov IS, Garcia FG, Gaspero M, Giller I, Golovtsov VL, Gouffon P, Gülmez E, Kangling H, Iori M, Jun SY, Kaya M, Kilmer J, Kim VT, Kochenda LM, Konorov I, Kozhevnikov AP, Krivshich AG, Krüger H, Kubantsev MA, Kubarovsky VP, Kulyavtsev AI, Kuropatkin NP, Kurshetsov VF, Kwan S, Lach J, Lamberto A, Landsberg LG, Larin I, Leikin EM, Yunshan L, Luksys M, Lungov T, Maleev VP, Mao D, Chensheng M, Zhenlin M, Mathew P, Mattson M, Matveev V, McCliment E, Moinester MA, Molchanov VV, Morelos A, Nelson KD, Nemitkin AV, Neoustroev PV, Newsom C, Nilov AP, Nurushev SB, Ocherashvili A, Onel Y, Ozel E, Ozkorucuklu S, Penzo A, Petrenko SV, Pogodin P, Procario M, Prutskoi VA, Ramberg E, Rappazzo GF, Razmyslovich BV, Rud VI, Russ J, Schiavon P, Simon J, Sitnikov AI, Skow D, Smith VJ, Srivastava M, Steiner V, Stepanov V, Stutte L, Svoiski M, Terentyev NK, Thomas GP, Uvarov LN, Vasiliev AN, Vavilov DV, Verebryusov VS, Victorov VA, Vishnyakov VE, Vorobyov AA, Vorwalter K, You J, Wenheng Z, Shuchen Z, Zukanovich-Funchal R. Precision measurements of the lambda(+)(c) and D0 lifetimes. Phys Rev Lett 2001; 86:5243-5246. [PMID: 11384468 DOI: 10.1103/physrevlett.86.5243] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2000] [Indexed: 05/23/2023]
Abstract
We report new precision measurements of the lifetimes of the Lambda(+)(c) and D0 from SELEX, the charm hadroproduction experiment at Fermilab. Based upon 1630 Lambda(+)(c) and 10 210 D0 decays we observe lifetimes of tau[Lambda(+)(c)] = 198.1+/-7.0+/-5.6 fs and tau[D0] = 407.9+/-6.0+/-4.3 fs.
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Affiliation(s)
- A Kushnirenko
- Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213, USA
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